Machine for cutting and splitting shovel-blanks



(No Model.) 2 SheetsSheet 1.

J. J. JOHNSTON.

MACHINE FOR CUTTING AND SPLITTING SHOVBL BLANKS.

No. 385.811. Patented July 10, 1888.

x "II" lllllllll I H M (No Model.) 2 Sheets-Sheet 2 J. J. JOHNSTON.

MACHINE FOR CUTTING AND SPLITTING SHOVEL BLANKS. No. 385,811. Patented July 10, 1888.

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secured a corresponding die, I).

UNITED STATES PATENT OFFICEo JAMES J. JOHNSTON, OF COLUMBIANA, OHIO, ASSIGNOR TO HENRY M. MYERS, OF BEAVER FALLS, PENNSYLVANIA.

MACHlNE FOR CUTTING AND SPLITT'ING SHOVEL-BLANKS.

SPECIFICATION forming part of Letters Patent No. 385,811, dated July 10, 1888.

Serial No. 263,523. (No model.)

To all 'LU7L07721 it may concern:

Be it known that JllnEs J. JoIINsToN, a citizen of the United States, residing at C0- lnmbiana, in the county of Oolnmbiana and State of Ohio, have invented certain new and useful Improvements in Machines for Cutting Blanks and Splitting the Tang; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to the art of shovelmaking, and has for its object the construction of a machine for cutting blanks, splitting the tang, and forming the socket for the handlestraps.

' The invention will be hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, which form part of this specification, Figure 1 represents a front elevation; Fig. 2, a vertical section on the line at, Fig. 1. Fig. 3 is a plan in detail on line 3/ 9 Fig. 2; Fig. 4, an enlarged perspective of a bar, showing blanks in dotted lines; and Fig. 5, a similar view of a blank cut from a bar.

Reference being had to the drawings and the letters marked thereon, A represents an ordinary cutting or punching machine, provided with astop-motiou (not shown) and with a reciprocating head, B, to which is detachably secured a knife, a, and in the lower part or anvil, O, of the machine is also detaohably In the anvil is formed a horizontal transverse slot, 0, and a vertical angular slot, d-the former to receive a knife, e, and the latter to receive a wedge, f, attached to the head of the machine. The outer end of the knife 6 is provided with a dovetailed head, 9, which engages with a groove, 71, in the inner surface of the wedge. By this construction the knife 0 is forced into the edge of the bar D, while lying in the longitudinal groove or slot i in the upper surface of the anvil, by the downstroke of the head B and withdrawn by the upstroke.

Other means may be employed for operating the horizontal knife without departing from the spirit of my invention.

the blank.

To the front surface of the anvil is secured a roller, 70, against which the outer surface of the wedgefbears to hold it to its work while forcing the knife 0 into the edge of the bar.

In the operation of making blanks by my improved machine a bar of a predetermined width and thickness is heated and placed in the sloti of the anvil. The downstroke of the head B causes the wedgef to force the knife 0 into the edge of the bar D, and forms an incision, Z, in that portion of the bar which afterward becomes the tang m of the blank E when severed from the bar. \Vhile this operation is being performed the knife a and the die I) cut out the rectangular corner a (shown in dotted lines in Fig. 4) at the end of the bar. The upstroke of the head B withdraws the knife 6 and leaves an opening in the bar. The bar is then turned and moved along in the slot i, when the next downstroke of the head B will drive the knife e into the bar on the side oppositeto that in which theincision Z was made by the former stroke, and simultaneously there- With the knife a and the die b will cut a complete shovel-blank from the bar, with its tang split and the socket for the handle formed.

Each successive stroke of the machine after the first one on each bar severs a complete blank ready for the reducing-rollsa result hitherto never obtained. The bar is reversed after each operation. By reference to Fig. 5 it will be seen that theincision Z in the tang m does not extend quite to the side edges of the tang, but leaves a small uncut portion, 0 0, on each side. By this construction the blank can be rolled longitudinally in one direction with out spreading or creasing the handle-straps formed by the tang. After the blank has been severed from the bar a little cinder is thrown into the incision Z, to prevent the severed parts from adhering to each other in rolling the blank, and after the blank has been rolled out to its full dimensions the handle-straps are released by trimming the uncut portion from A clamping plate or bar (not shown) may be used across the upper surface of the anvil to hold the bar down in the groove i. Other blanks than those used for making shovels can be manufactured in this manner with equal facility and dispatch, and, instead of laying the bar on its side to make the incision in its edges alternately, the bar may be placed on one edge and the incision made in the opposite edge by a vertical knife, and the corner-pieces a may be cut out and the blank severed from the bar by horizontal knives or cutters.

The method involved in the manufacture of blanks herein described is claimed in my application Serial No. 268,521, and the blank as a new article of manufacture is claimed in my application Serial No. 268.522.

Having thus fully described my invention, What I'claim is- 1. In a machine forcutting blanks, the combination ofa movable head, a cuttingoff k nife, a projection secured to said head, and a knife operated by said projection for making an i n-' cision in the edge of a bar, substantially as de scribed. l

2. In a machine for cutting blanks, the c'o mbination' of a movable head provided vwith a vertical arm or projection, a cutting-off knife secured to said head, and a knife for splitting the tang of the blank before it is cut off, operated by said head inunison with the cuttingof knife, substantially as described.

3. In a machine for cutting blanks, a reciprocating head, a projection on said head, and a vertical cutting-off knife secured to the head, in combination with an anvil provided with a groove constructed to receive and guide a bar, and a knife operated by the projection on the head for making an incision in the edge of the bar, substantially as described.

4. In a machine for cutting blanks, an anvil having a groove to support and guide a bar, a reciprocating head carrying acutting-offknife, anda projecting wedge, in combination with a knife for making an incision in the edge of a bar and reeipro cated by said wedge, substantially as described.

5. In a machine for cutting blanks, an anvil having a longitudinal and a transverse slot, a reciprocating head, and a cutting-off knife, in combination with a reciprocating knife for making an incision in a bar, and adapted to movein'said transverse slot,a projecting wedge secured to said head, and connected to the latter knife by a sliding joint, substantially as described.

6. In a machine for cutting blanks, a reciprocating head, a knife, and a projecting wedge secured thereto, in combination with an anvil having a longitudinal slot for supporting a bar, a transverse slot, and a vertical angular slot, a horizontally-reciprooating knife operated by the wedge on said reciprocating head, and a roller for holding the wedge'to its work, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES J. JOHNSTON.

WVitnesses:

D. G. REINOHL, WM. E. DYRE. 

